Caster.



No. 632,l66.' Patented Aug. 29, I899;

E. 0. BERNINGHAUS &. B. KOCHS.

EASTER.

(No Model.) (Application filed (fan. so, 1999,

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ria 0 W l .7 C 7 8 I 1 mg flm mmninm-m NI'IED TATES EDMUND O.BERNINGHAUS AND BENJAMIN KOOHS, OF ST. LOUIS, MISSOURI.

CASTER.

SPECIFICATION forming part of Letters Patent N 0. 632,166, dated August29, 1899.

Application filed January 30, 1899. Serial No. 703,843. (No model.)

To all whom it may concern:

Be it known that we, EDMUND O. BERNING- HAUS and BENJAMIN KOOHS,citizens of the United States, residing at the city of St. Louis, in theState of Missouri, have invented certain new and useful Improvements inTwo- Roller Casters, of which the following is a full, clear, and exactdescription, reference being bad to the accompanying drawings, formingpart of this specification.

Our invention relates to casters for trucks, furniture, or otherarticles commonly supported on casters, the object of the inventionbeing to provide a two-roller caster in which the axle is capable ofswiveling when either of the rollers passes over an obstruction, wherebyan oscillation of the rollers and axle is obtained to obviate theoccurrence of strain upon the axle.

Our invention consists in features of novelty hereinafter fullydescribed, and pointed out in the claim.

Figure I is a perspective view of a two-roller caster constructed inaccordance with our invention. Fig. II is a view, partly in elevationand partly in section, through the casterleg and rollers. Fig. III is aperspective View of the caster leg and shank and the axle detached. Fig.IV is a view, partly in elevation and partly in section, of thecaster-shank and a varied form of sleeve thereon. Fig. V is a verticalsectional view of a modified construction of the swivel connectionbetween the caster-leg and axle.

1 designates a sleeve which may be affixed to the supported articleAbybolts or screws 2.

3 designates the caster-leg, having a shank 4 and shoulder 5. Theshankis provided with a groove 6 and when seated in the sleeve 1 is heldtherein by a set-screw 7 in the sleeve, extending therethrough andseating in the groove 6, while the shoulder 5 at the base of theleg-shank bears against the bottom of the sleeve to turn thereagainst.The leg 3 is provided with a rectangular aperture 8, extendingtherethrough. Within the aperture 8 the leg is formed with a pendentknife-edge projection or V-shaped portion 9. (See full lines, Fig. II,and dotted lines, Fig. III.)

10 designates the rectangular body of the axle, having straight sidesfitting between the side walls of the aperture 8, but of lesser height,so that a vertical play of the said body is allowed within the aperture.The axle has spindles 11, on which the two rollers 12 are mounted andsecured by nuts 13 or other suitable means. The top of the body 10 ofthe axle is formed with a V-shaped groove 14, that receives theknife-edge projection or V-shaped portion 9 of the leg 3, so that theaxle is capable of swiveling against the said portion 9 withoutdisplacement.

In the use of this caster when either of the rollers 12 pass over anobstruction that causes it to be raised out of the plane on which itscompanion roller is moving the axle swivels within the aperture 8,permitting the elevated roller to rise, while the other roller swingsinwardly to accommodate the movement of the obstructed roller, and as aconsequence there is no resultant strain on the axle by which therollers are carried.

In Fig. IV we have shown a sleeve 1, adapted to be inserted within thesupported article to receive the shank I of the caster instead ofattaching it to the exterior of the supported article.

In Fig. V we have shown'a modification of the swivel connection betweenthe caster-leg 3 and axle. In this form of the device the swivel portion9 of the caster-leg is rounded instead of tapering and bears uponacoincident rounded portion 14 on the upper side of the axle-bod y, sothat the axle swivels against the portion 9. The axle is held in placein the leg-aperture S" by a pivot-pin 15, that prevents the endwisedisplacement of the axle.

We claim as our invention A caster comprising a pair of rollers, a legformed with a transverse rectangular aperture, and with a knife-edgependent projection within the rectangular aperture, and located betweenthe rollers and a fixed axle formed with a rectangular body locatedwithin the rectangular aperture and with a V-shaped recess in the top ofthe body in which the knife-edge has bearing to support the leg betweenthe rollers; substantially as described.

ED. 0. BERNINGHAUS. BENJAMIN KOCHS.

In presence of E. S. KNIGHT, STANLEY STONER.

